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// Copyright 2014 The Bazel Authors. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package com.google.devtools.build.skyframe;
import com.google.devtools.build.skyframe.InvalidatingNodeVisitor.DeletingNodeVisitor;
import com.google.devtools.build.skyframe.InvalidatingNodeVisitor.DirtyingNodeVisitor;
import com.google.devtools.build.skyframe.InvalidatingNodeVisitor.InvalidationState;
import java.util.concurrent.ForkJoinPool;
import javax.annotation.Nullable;
/**
* Utility class for performing eager invalidation on Skyframe graphs.
*
* <p>This is intended only for use in alternative {@code MemoizingEvaluator} implementations.
*/
public final class EagerInvalidator {
private EagerInvalidator() {}
/**
* Deletes given values. The {@code traverseGraph} parameter controls whether this method deletes
* (transitive) dependents of these nodes and relevant graph edges, or just the nodes themselves.
* Deleting just the nodes is inconsistent unless the graph will not be used for incremental
* builds in the future, but unfortunately there is a case where we delete nodes intra-build. As
* long as the full upward transitive closure of the nodes is specified for deletion, the graph
* remains consistent.
*/
public static void delete(
InMemoryGraph graph,
Iterable<SkyKey> diff,
DirtyTrackingProgressReceiver progressReceiver,
InvalidationState state,
boolean traverseGraph)
throws InterruptedException {
DeletingNodeVisitor visitor =
createDeletingVisitorIfNeeded(
graph, diff, progressReceiver, state, traverseGraph);
if (visitor != null) {
visitor.run();
}
}
@Nullable
static DeletingNodeVisitor createDeletingVisitorIfNeeded(
InMemoryGraph graph,
Iterable<SkyKey> diff,
DirtyTrackingProgressReceiver progressReceiver,
InvalidationState state,
boolean traverseGraph) {
state.update(diff);
return state.isEmpty() ? null
: new DeletingNodeVisitor(graph, progressReceiver, state, traverseGraph);
}
@Nullable
static DirtyingNodeVisitor createInvalidatingVisitorIfNeeded(
QueryableGraph graph,
Iterable<SkyKey> diff,
DirtyTrackingProgressReceiver progressReceiver,
InvalidationState state) {
state.update(diff);
return state.isEmpty() ? null : new DirtyingNodeVisitor(graph, progressReceiver, state);
}
@Nullable
private static DirtyingNodeVisitor createInvalidatingVisitorIfNeeded(
QueryableGraph graph,
Iterable<SkyKey> diff,
DirtyTrackingProgressReceiver progressReceiver,
InvalidationState state,
ForkJoinPool forkJoinPool,
boolean supportInterruptions) {
state.update(diff);
return state.isEmpty()
? null
: new DirtyingNodeVisitor(
graph,
progressReceiver,
state,
forkJoinPool,
supportInterruptions);
}
/** Invalidates given values and their upward transitive closure in the graph if necessary. */
public static void invalidate(
QueryableGraph graph,
Iterable<SkyKey> diff,
DirtyTrackingProgressReceiver progressReceiver,
InvalidationState state)
throws InterruptedException {
DirtyingNodeVisitor visitor =
createInvalidatingVisitorIfNeeded(graph, diff, progressReceiver, state);
if (visitor != null) {
visitor.run();
}
}
/**
* Invalidates given values and their upward transitive closure in the graph if necessary, using
* the provided {@link ForkJoinPool}.
*/
public static void invalidate(
QueryableGraph graph,
Iterable<SkyKey> diff,
DirtyTrackingProgressReceiver progressReceiver,
InvalidationState state,
ForkJoinPool forkJoinPool,
boolean supportInterruptions)
throws InterruptedException {
DirtyingNodeVisitor visitor =
createInvalidatingVisitorIfNeeded(
graph, diff, progressReceiver, state, forkJoinPool, supportInterruptions);
if (visitor != null) {
visitor.run();
}
}
}
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